MY CAR IS DYING HELP!!!!

318racer · 12-14-2007, 02:22 AM

hey guys,

I'vw had a huge problem with my car for a while now and it is making me sick with worry, and i thought maye some of you would know why its happening. Every time i accelerate my car quickly my car just bogs and i have a suspicion it might be misfiring. Its literally soo slow that i cant even accelerate fast enough to get on the highway ramp wihtout it bucking and hesitating. Also the ennginge refuses to go above 5000 rpms. By the time it hits 3500-4000 rpms it just starts bucking violently and i get too scared to push it further. O yeah if its relevant my Asc light flashes on and off and my brake light is on.

there was a similar thread on bimmerforums, but after reading through all 88 pages of it, i still have no idea what the cause is

So based on the symptoms described, does anyone think they know what the cause is? Has anyone had these problems?

cali-ti · 12-14-2007, 03:53 AM

what kind of weather are you in when this occurs? if it's nice and dry (no reason for your car to be slipping), it sounds like the ASC is coming on when it shouldn't be (my guess it that it thinks for some reason that your rear tires are slipping).

does you have any codes stored? does the engine run really rough like it's missing?

L84THSKY · 12-14-2007, 04:08 AM

Like Cali-Ti said, could be your ASC. When you start the car, disengage the ASC, and see if the problem goes away.

Quote:

Originally Posted by 318racer

hey guys,

I'vw had a huge problem with my car for a while now and it is making me sick with worry, and i thought maye some of you would know why its happening. Every time i accelerate my car quickly my car just bogs and i have a suspicion it might be misfiring. Its literally soo slow that i cant even accelerate fast enough to get on the highway ramp wihtout it bucking and hesitating. Also the ennginge refuses to go above 5000 rpms. By the time it hits 3500-4000 rpms it just starts bucking violently and i get too scared to push it further. O yeah if its relevant my Asc light flashes on and off and my brake light is on.

there was a similar thread on bimmerforums, but after reading through all 88 pages of it, i still have no idea what the cause is

So based on the symptoms described, does anyone think they know what the cause is? Has anyone had these problems?

318racer · 12-14-2007, 05:07 AM

Quote:

Originally Posted by cali-ti

what kind of weather are you in when this occurs? if it's nice and dry (no reason for your car to be slipping), it sounds like the ASC is coming on when it shouldn't be (my guess it that it thinks for some reason that your rear tires are slipping).

does you have any codes stored? does the engine run really rough like it's missing?

I noticed that it was running best in cold weather. It seems to [I]really[I] bog down in warm weather i dont know why though. Again, pressing the ASC does nothing its almost as if the button doesn't do anything.
Do you guys think it could be a vacum leak, plugs, injectors, MAF sensors and stuff like that? whatabout the cranksaft positioning sensor?

**cooljess76** · 12-14-2007, 05:19 AM

cracked intake boot or loose oil cap? Take off the ribbed flexboot between the MAF and ASC valve, check inside of it for cracks or splits. Also have you recently added oil or taken off the oil fill cap? If so, make sure you tightened it securely. It's possible to only engage 1 side of the oil cap and then twist it to the stop point thinking it's on completely. If this is the case, your car won't run right and you'll get similar symptoms. Good Luck, keep us posted.

KetteringTi · 01-03-2008, 11:58 PM

I'm having this issue as well... Motor won't even rev past 2000 rpm without cutting out and popping, bucking violently etc. It only happens after heavy rain and usually goes away, but this time it hasn't. Thought the DME might be wet, but I pulled it and even let it out over night. No change. I'm gonna start replacing things, but if anyone knows what the culprit is, I'd be grateful to know.

S

Bloodrunsdry · 01-04-2008, 12:07 AM

Anyone getting a CEL? seems like something that bad should be sending something to the computer. Also tap on the cat to see if it is solid if not that could be a big part of the problem. vacum leaks usualy cause other isues

KetteringTi · 01-04-2008, 12:28 AM

Hah, yeah I used to get a CEL until the f*cking last shop I used in PA disabled it...

This is really unlike anything I've experienced. It will rev and idle just like normal until it hits 3k or whatever it decides to be that day, and it just sits there and bounces, just like hitting a fuel cut except with much more drama and popping, bleching, etc.

318racer · 01-06-2008, 12:51 AM

As far as i know, i have never had a cel but maybe the previous owner disabled it. Wow KetteringTi seems to have the same problem too. Does anyone have any ideas? I changed my fuel filter with no changes...

iananderson02 · 01-06-2008, 12:58 AM

check your fuel pressure, sounds like a fuel pressure regulator or a huge vacuum leak. those can cause crazy hesitation and "bucking".

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